THE CATTEDOWN BONE CAVE. 
33 
the occipital bones. Parietal bones are also intact. Several of the 
skulls were exceptionally thick ; others again are very thin. 
The accompanying Miesenbach plates give profiles of the two 
skulls, and views of four of the lower jaws. Beneath is a sketch 
of the skulls — full face. 
So far as I am able to judge of the shape and proportions 
of the crania, they are neither dolichocephalic nor brachycephalic, 
but of a middle type — orthocephalic. They are also essentially 
orthognathous, and some of the lower jaws have prominent chins. 
The teeth are large and singularly free from traces of decay, 
although in many cases much worn, and the jaws in every 
instance give ample room for the full number. 
Now as to the age of the deposits. I do not of course commit 
myself to any absolute chronological statement. There are 
no positive data for this beyond the fact that the existence 
of the rhinoceros and lion and hyaena in this country is pre- 
historic. ISTor do I intend to found any argument upon such a 
very variable factor as the growth of stalagmite. 
But there is no need to stop here. The conditions of the 
deposits seem to render a very considerable change of level 
essential to the carriage of the contents of the breccia by water 
in flood ; and we cannot separate them from others in the 
locality. In dealing with the general question in my paper on the 
" Bone Caves of the Plymouth District " already cited, I re-affirmed 
a suggestion made in an earlier paper on the Geology of Plymouth, 6 
that the deposits in the caverns at Oreston, and in the fissures on 
6 Plym. Inst. Trans, v. 475. 
VOL. X. D 
